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Can Dogs Get Lung Cancer From Secondhand Smoke?

Dr. Mark is a veterinarian. He has been working with dogs for more than 40 years.

Secondhand smoke can be very detrimental to your pet's health.

Secondhand smoke can be very detrimental to your pet's health.

Although it seems pretty obvious to those of us who have seen pets suffer from secondhand smoke, let's make it clear—smoking around your pet is bad for their health. That said, there is no statistical evidence that dogs develop lung cancer from being exposed to secondhand smoke. (1)

Effects of Secondhand Smoke in Dogs

What dogs do get through secondhand smoke are a host of other problems like asthma, chronic coughing, bronchitis, and recurrent bouts of pneumonia.

Secondhand smoke can be so bad that your dog is miserable all of the time when locked inside the house, and animals like that are going to bolt through any open door when given a chance. I especially worry about small dogs, cats, and parrots that have even less lung capacity than larger animals.

So even if your dog is not going to develop lung cancer, he or she is going to suffer. One more reason to stop smoking.


  1. Zierenberg-Ripoll, A., Pollard, R. E., Stewart, S. L., Allstadt, S. D., Barrett, L. E., Gillem, J. M., & Skorupski, K. A. (2018). Association between environmental factors including second-hand smoke and primary lung cancer in dogs. The Journal of small animal practice, 59(6), 343–349.

This article is not meant to substitute for diagnosis, prognosis, treatment, prescription, or formal and individualized advice from your veterinarian. Animals exhibiting signs and symptoms of distress should be seen by a veterinarian immediately.

© 2022 Mark dos Anjos DVM